Airborne oxygen production gas storage tank and use method thereof

Abstract

The invention provides a gas storage tank for airborne oxygen production and a using method of the gas storage tank, and belongs to the technical field of airborne oxygen production. A storage barrel in the gas storage tank is cylindrical, a gas outlet is formed in the center of the upper end of the storage barrel, an opening is formed in the lower end of the storage barrel, and a step is arranged close to the opening end; the minimum cylindrical inner diameter of the storage barrel is fit with the cylindrical inner diameter of the upper end of the end cover; a first air inlet through hole and a second air inlet through hole are symmetrically formed in the center of the lower end face of the end cover, the end cover is further provided with a first through hole and a second through hole, the first air inlet through hole penetrates through the first through hole of the end cover, the second air inlet through hole penetrates through the second through hole of the end cover, and a first one-way valve is arranged in the first through hole. A second one-way valve is arranged in the second through hole, and the upper end faces of the first one-way valve and the second one-way valve are attached to and fixed to the lower end face of the pressing plate; and the screw ring is matched and locked with the storage cylinder. The filter has the advantages of being simple, compact, reliable in work, long in service life and high in filtering precision and efficiency.

Description

Technical Field

[0001] This invention belongs to the field of airborne oxygen generation technology, and particularly relates to an airborne oxygen generation storage tank and its usage method. Background Technology

[0002] All airborne oxygen generation systems used in existing aircraft must be equipped with gas storage tanks to control the unidirectional flow of the output product gas, stabilize the product gas pressure, and perform fine filtration of the product gas.

[0003] Currently, there is a lack of a simple, compact, reliable, long-lasting, and highly accurate and efficient airborne oxygen storage tank. Summary of the Invention

[0004] To address the lack of a simple, compact, reliable, long-lasting, and highly accurate and efficient airborne oxygen storage tank in the existing technology, this invention provides an airborne oxygen storage tank and its usage method, the technical solution of which is as follows: In a first aspect, an airborne oxygen generator storage tank is provided, comprising: a storage cylinder 1, a filter element 2, a screw ring 5, an end cap 6, a pressure plate 7, a first one-way valve 8, and a second one-way valve 9. The first check valve 8 contains a first ball valve 8a, and the second check valve 9 contains a second ball valve 9a. Storage cylinder 1 is cylindrical with an air outlet C at the center of the upper end and an opening at the lower end. A step is provided near the opening, and the upper surface of the step is in contact with the upper surface of the step of the end cap 6. The minimum cylindrical inner diameter of storage cylinder 1 is in contact with the upper cylindrical inner diameter of the end cap 6. The end cap 6 has a symmetrical first air inlet hole A and a second air inlet hole B at the center of its lower end face. The end cap 6 also has a first through hole 6a and a second through hole 6b. The first air inlet hole A passes through the first through hole 6a of the end cap 6, and the second air inlet hole B passes through the second through hole 6b of the end cap 6. A first one-way valve 8 is installed in the first through hole 6a, and a second one-way valve 9 is installed in the second through hole 6b. The upper end faces of the first one-way valve 8 and the second one-way valve 9 are attached to and fixed to the lower end face of the pressure plate 7. The screw ring 5 is matched and locked with the storage cylinder 1, so that the storage cylinder 1 and the end cap 6 are fastened together as one unit. Optionally, the lower end of the filter element 2 is provided with a first mounting platform 2c and a second mounting platform 2d that are symmetrically arranged. The curvature s1 of the first mounting platform 2c and the second mounting platform 2d is greater than 0. The first mounting platform 2c is located in the first mounting groove 6c of the end cover 6, and the second mounting platform 2d is located in the second mounting groove 6d of the end cover 6. The curvature of the second mounting groove 6d and the first mounting groove 6c is greater than s1, and two symmetrical holes are provided at the curvature s2 position of the end cover 6 for installing connectors, ensuring that the first mounting platform 2c and the second mounting platform 2d are always in the left and right mounting grooves of the end cover 6, and the curvature of the first mounting groove 6c is greater than s2.

[0005] Optionally, the external thread of the screw ring 5 is matched and locked with the internal threaded hole at the lower end of the storage cylinder 1, ensuring that the annular protrusion on the upper end face of the screw ring 5 is pressed tightly against the stepped end face of the end cover 6.

[0006] Optionally, the filter element 2 consists of a filter membrane, an internal support for the filter membrane, and a filter membrane mounting support. The filter membrane is made of multiple layers of polytetrafluoroethylene membrane in the middle and one layer of polyester membrane on the inside and outside. The filter membrane is fixed by the internal support and the filter membrane mounting support. The filter element 2 has a filtration accuracy of 0.01um and a filtration efficiency of 99.99%.

[0007] Optionally, two symmetrical threaded holes are provided at the 6-radius s2 position of the end cap for installing two locking screws 3.

[0008] Optionally, the storage cylinder 1 and the end cap 6 are sealed with a sealing ring 4 to seal the gas inside the storage tank.

[0009] Optionally, a sealing ring 2a is provided between the end cap 6 and the filter element 2 to isolate the gases before and after filtration.

[0010] Optionally, the first ball valve 8a and the second ball valve 9a are made of polyoxymethylene material to reduce weight and avoid being affected by overload.

[0011] Secondly, a method for using any of the airborne oxygen-generating storage tanks described in the local area is provided, comprising: When the airborne oxygen generator is working normally, there is no air intake through the second air intake port B in the first half cycle, the second ball valve 9a of the second one-way valve 9 is in the closed state, and the upper end face of the guide column of the second ball valve 9a is higher than the upper end face of the pressure plate 7 by a distance of h; the oxygen-enriched gas output by the airborne oxygen generator enters through the first air intake port A, and the first ball valve 8a of the first one-way valve 8 is in the open state with an opening height of H. At this time, the upper end face of the guide column of the first ball valve 8a is higher than the upper end face of the pressure plate 7 by a distance of H+h, where both h and H are greater than 0; In the second half of the cycle, gas enters through the second inlet port B, and the second ball valve 9a of the second one-way valve 9 is in the open state. At this time, there is no gas intake through the first inlet port A, and the second ball valve 8a of the first one-way valve 8 is in the closed state. The first one-way valve 8 and the second one-way valve 9 work alternately in a 1 / 2 cycle, and oxygen-enriched gas is output from the outlet port C.

[0012] The beneficial effects of this invention are at least as follows: The overall structure is compact, with the storage tank and end cap fixed together by screw rings; the filter element has high porosity, low flow resistance and long service life, and is fixed to the end cap by the mounting platform; two one-way valves are installed in the through hole of the end cap, and the ball valve is made of polyoxymethylene material, which is lightweight and its performance is minimally affected by acceleration. The ball valve guide structure is simple and reliable, completely eliminating the risk of jamming under multiple stress conditions. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the gas storage tank of the present invention.

[0014] Figure 2 This is a structural diagram of the gas storage tank end cap of the present invention.

[0015] Figure 3 This is a top view of the filter element of the present invention.

[0016] Figure 4 This is the filter element test of the present invention.

[0017] Figure 5 This is a diagram of the internal structure of the filter element of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0020] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited from each other.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Please see Figure 1 One embodiment of the present invention provides an airborne oxygen generator storage tank, which includes a storage cylinder 1, a filter element 2, a locking screw 3, a sealing ring 4, a screw ring 5, an end cap 6, a pressure plate 7, a first one-way valve 8, and a second one-way valve 9. See Figure 4 The filter element 2 has a sealing ring 2a. The first check valve 8 contains a ball valve 8a, and the second check valve 9 contains a ball valve 9a.

[0023] The storage tank 1 is cylindrical with an outlet C at the center of the upper end and an opening at the lower end. There is a step near the opening end, and the upper surface of the step fits with the upper surface of the step of the end cover 6. The minimum cylindrical inner diameter of the storage tank 1 fits with the upper cylindrical inner diameter of the end cover 6, and the gas inside the storage tank is sealed by the sealing ring 4. See Figure 2 The end cap 6 has symmetrical air inlet holes A and B at the center of its lower end face. Air inlet hole A passes through the first through hole 6a of the end cap 6, and air inlet hole B passes through the second through hole 6b of the end cap 6. A first one-way valve 8 is placed in the first through hole 6a, and a second one-way valve 9 is placed in the second through hole 6b. The upper end faces of the first one-way valve 8 and the second one-way valve 9 are attached to the lower end face of the pressure plate 7 and fixed by screws. The external thread of the screw ring 5 matches and locks with the internal thread hole at the lower end of the storage cylinder 1, ensuring that the annular protrusion on the upper end face of the screw ring 5 is pressed tightly against the stepped end face of the end cover 6, thus securing the storage cylinder 1 and the end cover 6 together.

[0024] When the airborne oxygen generator is working normally, there is no air intake through hole B in the first half cycle, the ball valve 9a of the second one-way valve 9 is in the closed state, the upper end face of the guide column of the ball valve 9a is higher than the upper end face of the pressure plate 7, and the distance h is 2-4mm; the oxygen-enriched gas output by the airborne oxygen generator enters through through hole A, the ball valve 8a of the first one-way valve 8 is in the open state, the opening height H is 3-4mm, at this time the upper end face of the guide column of the ball valve 8a is higher than the upper end face of the pressure plate 7, and the distance H+h is 5-8mm; In the second half of the cycle, gas enters through the inlet port B, and the ball valve 9a of the second check valve 9 is in the open state. At this time, there is no gas intake through the port A, and the ball valve 8a of the first check valve 8 is in the closed state. The first check valve 8 and the second check valve 9 work alternately in a 1 / 2 cycle, and oxygen-rich gas is output from the outlet C. The ball valves 8a and 9a are made of polyoxymethylene material to reduce weight and avoid being affected by overload.

[0025] See Figure 2 and Figure 3 The lower end of filter element 2 has symmetrical mounting platforms 2c and 2d, with an arc of 50 degrees. o Mounting platform 2c is placed in mounting groove 6c of end cover 6, and mounting platform 2d is placed in mounting groove 6d of end cover 6. The curvature of mounting groove 6d is 55 degrees. o The mounting slot 6c has a radius of 75 degrees. o 65 degrees of curvature oThere are two symmetrical threaded holes at the position for installing two locking screws 3, ensuring that the left and right mounting platforms of the filter element 2 are always in the left and right mounting grooves of the end cover 6, and isolating the gas before and after filtration through the sealing ring 2b.

[0026] See Figure 5 In one embodiment, the filter element 2 is composed of a filter membrane 21, an inner support member 22 and a filter membrane mounting support member 23. The filter membrane is formed by folding four layers together: two middle layers of polytetrafluoroethylene membrane and one inner and one outer layer of polyester membrane. The inner support member and the filter membrane mounting support member fix the filter membrane.

[0027] Filter element 2 has a filtration accuracy of 0.01µm and a filtration efficiency of 99.99%.

[0028] The working principle of this invention is as follows: In the first half of the cycle, the oxygen-enriched product gas produced by the airborne oxygen generation system enters the first one-way valve 8 through the air inlet port A, pushing the ball valve 8a of the one-way valve 8 to move upward. The oxygen-enriched gas enters the inner cavity of the filter element 2, and after fine filtration (filtration accuracy 0.01um), it flows from the inside to the outside into the outer cavity of the storage tank 1. At this time, there is no air intake through the port B, and the second one-way valve 9 is closed. In the second half of the cycle, the oxygen-enriched gas enters the second one-way valve 9 through the air inlet B, pushing the ball valve 9a of the one-way valve 9 upward. The oxygen-enriched gas enters the inner cavity of the filter element 2, and after fine filtration (filtration accuracy 0.01um), it flows from the inside to the outside into the outer cavity of the storage tank 1. At this time, there is no air intake through the through hole A, and the first one-way valve 8 is closed. The first one-way valve 8 and the second one-way valve 9 work alternately in a 1 / 2 cycle, and the oxygen-enriched gas is output from the outlet C and enters the downstream oxygen supply system for the pilot's use.

[0029] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Furthermore, any parts of the present invention not described in detail are conventional techniques.

Claims

1. An airborne oxygen generator storage tank, characterized in that, include: Storage cylinder (1), filter element (2), screw ring (5), end cap (6), pressure plate (7), first check valve (8), and second check valve (9). The first check valve (8) contains a first ball valve (8a), and the second check valve (9) contains a second ball valve (9a). The storage cylinder (1) is cylindrical, with an air outlet C at the center of the upper end and an opening at the lower end. A step is provided near the opening end, and the upper surface of the step is in contact with the upper surface of the step of the end cap (6). The minimum cylindrical inner diameter of the storage cylinder (1) is in contact with the upper cylindrical inner diameter of the end cap (6). The end cap (6) has a symmetrical first air inlet hole A and second air inlet hole B at the center of the lower end face. The end cap (6) also has a first through hole (6a) and a second through hole (6b). The first air inlet hole A passes through the first through hole (6a) of the end cap (6), and the second air inlet hole B passes through the second through hole (6b) of the end cap (6). The first through hole (6a) is equipped with a first one-way valve (8), and the second through hole (6b) is equipped with a second one-way valve (9). The upper end faces of the first one-way valve (8) and the second one-way valve (9) are attached to and fixed to the lower end face of the pressure plate (7). The screw ring (5) is matched and locked with the storage cylinder (1) so that the storage cylinder (1) and the end cap (6) are fastened together.

2. The airborne oxygen generator storage tank according to claim 1, characterized in that, The lower end of the filter element (2) is provided with a first mounting platform (2c) and a second mounting platform (2d) that are symmetrically arranged on the left and right. The arc s1 of the first mounting platform (2c) and the second mounting platform (2d) is greater than 0. The first mounting platform (2c) is located in the first mounting groove (6c) of the end cover (6), and the second mounting platform (2d) is located in the second mounting groove (6d) of the end cover (6). The arc of the second mounting groove (6d) and the first mounting groove (6c) is greater than s1, and two symmetrical holes are provided at the arc s2 position of the end cover (6) for installing connectors, so as to ensure that the first mounting platform (2c) and the second mounting platform (2d) are always in the left and right mounting grooves of the end cover (6). The arc of the first mounting groove (6c) is greater than s2.

3. The airborne oxygen generator storage tank according to claim 1, characterized in that, The external thread of the screw ring (5) matches and locks with the internal thread hole at the lower end of the storage cylinder (1), ensuring that the annular protrusion on the upper end face of the screw ring (5) is pressed tightly against the stepped end face of the end cap (6).

4. The airborne oxygen generator storage tank according to claim 1, characterized in that, The filter element (2) consists of a filter membrane, an internal support for the filter membrane, and a filter membrane mounting support. The filter membrane is composed of multiple layers of polytetrafluoroethylene membrane in the middle and one layer of polyester membrane on the inside and outside. The filter membrane is fixed by internal support components and filter membrane mounting support components.

5. The airborne oxygen generator storage tank according to claim 2, characterized in that, Two symmetrical threaded holes are provided at the arc s2 position of the end cap (6) for installing two locking screws (3).

6. The airborne oxygen generator storage tank according to claim 1, characterized in that, The storage cylinder (1) and the end cap (6) seal the gas inside the storage tank through the first sealing ring (4).

7. The airborne oxygen generator storage tank according to claim 1, characterized in that, A second sealing ring (2a) is provided between the end cap (6) and the filter element (2) to isolate the gas before and after filtration.

8. The airborne oxygen generator storage tank according to claim 1, characterized in that, The first ball valve (8a) and the second ball valve (9a) are made of polyoxymethylene material.

9. A method of using an airborne oxygen generator storage tank as described in any one of claims 1 to 7, characterized in that, include: When the airborne oxygen generator is working normally, there is no air intake through the second air intake hole B in the first half cycle. The second ball valve (9a) of the second one-way valve (9) is closed. The upper end face of the guide column of the second ball valve (9a) is higher than the upper end face of the pressure plate (7) by a distance of h. The oxygen-enriched gas output by the airborne oxygen generator enters through the first air intake hole A. The first ball valve (8a) of the first one-way valve (8) is open with an opening height of H. At this time, the upper end face of the guide column of the first ball valve (8a) is higher than the upper end face of the pressure plate (7) by a distance of H+h. In the second half of the cycle, the gas enters through the second inlet port B, and the second ball valve (9a) of the second check valve (9) is in the open state. At this time, there is no gas intake through the first inlet port A, and the second ball valve (8a) of the first check valve (8) is in the closed state. The first check valve (8) and the second check valve (9) work alternately in a 1 / 2 cycle, and the oxygen-enriched gas is output from the outlet port C.

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